
/*
 * Copyright 2013 Google Inc.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 *   Author: Martin Gorner (mgorner@google.com)
 */

// init canvas and resize it to full extent of containing canvas element
function initCanvas(id)
{
	var canvasElement = document.getElementById(id);
	if (canvasElement == null)
		return null;
	canvasElement.width = canvasElement.clientWidth;
	canvasElement.height = canvasElement.clientHeight;
	var context = canvasElement.getContext("2d");
	return context;
}